Enabling 4C Fast Charging of Lithium–Ion Batteries by Coating Graphite with a Solid–State Electrolyte
Journal Article
·
· Advanced Energy Materials
- Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan
- Univ. of Michigan, Ann Arbor, MI (United States)
Enabling fast-charging (≥4C) of lithium-ion batteries is an important challenge to accelerate the adoption of electric vehicles. However, the desire to maximize energy density has driven the use of increasingly thick electrodes, which hinders rate capability. Herein, atomic layer deposition is used to coat a single-ion conducting solid electrolyte (Li3BO3-Li2CO3) onto postcalendered graphite electrodes, forming an artificial solid-electrolyte interphase (SEI). When compared to uncoated control electrodes, the solid electrolyte coating: 1) eliminates natural SEI formation during preconditioning; 2) decreases interphase impedance by >75% compared to the natural SEI; and 3) extends cycle life under 4C charging conditions, enabling retention of 80% capacity after 500 cycles (compared to 12 cycles in the uncoated control) in pouch cells with >3 mAh cm–2 loading. Furthermore, this work demonstrates that 4C charging without Li plating can be achieved through purely interfacial modification without sacrificing energy density and sheds new light on the role of the SEI in Li plating and fast-charge performance.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0008362
- OSTI ID:
- 1960220
- Alternate ID(s):
- OSTI ID: 1829404
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 1 Vol. 12; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Operando detection of Li plating during fast charging of Li-ion batteries using incremental capacity analysis
Highly Ordered Hierarchical Anodes for Extreme Fast Charging Batteries (Final Report)
Journal Article
·
Tue May 17 20:00:00 EDT 2022
· Journal of Power Sources
·
OSTI ID:1960222
Highly Ordered Hierarchical Anodes for Extreme Fast Charging Batteries (Final Report)
Technical Report
·
Tue Aug 31 00:00:00 EDT 2021
·
OSTI ID:1820637